System and method for controlling communication on a signal bus
AssigneeESS Technology, Inc.
InventorsMing Hong Chan, Elim Huang, Andy Ho
Life of this patent
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Abstract
A method for controlling communication on a bus connecting a first processor, a second processor, and a device. The method transmits a first control signal from the first processor to the second processor via a control signal line, causing a bus connection of the second processor to enter a high-impedance state, transfers data between the device and the first processor via the bus, then setting a bus connection of the first processor to the high-impedance state, and transmits a second control signal from the first processor to the second processor via the control signal line, causing the bus connection of the second processor to exit the high-impedance state.
Claims9
A method for controlling communication on a bus connecting a first processor, a second processor, and a device, comprising:
- transmitting a first control signal from the first processor to the second processor via a control signal line, causing a bus connection of the second processor to enter a high-impedance state;
- transferring data between the device and the first processor via the bus, then setting a bus connection of the first processor to the high-impedance state;
- and
- transmitting a second control signal from the first processor to the second processor via the control signal line, causing the bus connection of the second processor to exit the high-impedance state.
A system for controlling communication on a bus, comprising:
- a first processor connected to the bus via a first bus connection, the first bus connection having a controlled impedance, the first processor having an auxiliary connection for transmitting a reset signal via a reset signal line;
- a second processor connected to the bus via a second bus connection, the second processor also having a reset pin, the second bus connection having an impedance controlled by the reset signal received by the reset pin.
Dependencies are inferred from the claim text.